Headed cylinder.



No. 630,607. Patented Aug. 8, I899.

W. E. HILL.

HEADED CYLINDER.

(Application filed May 21, 1898.) aNo Model.) 2 Sheets-Sheet I.

No. 630,607. Patented Aug. 8, I899. w. E. HILL.

HEADED CYLINDER.

(Application filed May 21, 1898.)

2 Sheets-Sheet 2,

(No Model.)

UNITED STATES PATENT OFFICE.

WARREN E. HILL, on NEW YORK, N. Y.

HEADED CYLINDER.

srncrFrcA'rioN forming part of Letters Patent No. 630,607, dated August8, 189's.

Application filed May 21, 1898. Serial No. 681,365. (No model.)

.To all whom it may concern.-

Be it known that IJVARREN HILL, a resident of the city of New York,borough of Brooklyn, county of Kings, and State of New York, haveinvented certain new and useful Improvements in HeadedOylinders, ofwhich the following is a specification, reference being had to theaccompanying drawings.

The present article of manufacture and the method of producing the samerelate to the art shown by my United States Letters Patent No. 414,643,dated November 5, 1889, which art comprises manufacturing a cylindricalstructure (to be used as a steam boiler, shell, or drum, boiler-flue, oras a receptacle for use to withstand high pressure) provided with a heador heads having formed therefrom cylindrical flanges which are welded tothe end edges of the cylindrical structure. In the said patent isillustrated and described a cylinder and a head (for the cylinder)having formed therefrom cylindrical flanges which are welded to thecylinder, which head has an opening through the same of diameter nearlythat of the cylinder, whereas the present invention relates to acylindrical body having a head (provided with cylindricallyformed edgesformed and attached to the body as set forth in said patent) adapted topractically close the end of the cylindrical body. In manufacturing sucha cylinder with a closing head it is necessary to provide for applyingand operating suitable mechanism within the cylinder to assist ineffecting welding of the cylindrical flange of the head to the end ofthe cylindrical body for the purpose of attaching connecting-pipes, forrepairs,

or for the purpose of cleaning the cylinder,

&c. Accordingly I make the head of such a closed cylinder with anopening through the same, (which serves to permit introduction ofwelding or other mechanism within the cylinder and as a n1anhole,) whichopening is to be normally closed by a bonnet, cap, or like device. Inorder to properly secure to the head a device certainly closing theopening through the head, it is necessary, in View of the conditions ofhigh pressure attending the use of such a closed cylinder, andespecially to prevent leakage, to make the flange surrounding theopening through the head integral with the other walls of the head andof greater thickness for the purpose of providing an elfective andnondeaking anchorage for bolts or other devices engaging such flange anda closing bonnet or cap.

The invention consists of a headed platemetal cylinder or cylindricalreceptacle the head of which has edges cylindrically shaped therefromand welded to the end of the cylinder, said head having a passagethrough the same the walls of which are integral with and thicker thanthe other walls of the head, andof the method of producing such a headedcylinder by making a plate-metal cylinder, then working a plate-metalblank or blanks to produce a head for such cylinder, and so thatportions of said blank designed to become walls of a passage through thehead are integral with and thicker than the other portions of the blank,and cylindrically shaping the edges of such blank and welding the sameto the end edges of the said cylinder.

Figure 1 represents a cross-section of a circular plate-metal blank andthe cross-section of a head-blank for a cylinder. Figs. 2 and 3represent other plate blanks and corresponding head-blanks shapedtherefrom. Fig. 4 represents a cross-section of a final form of head andthe end of a cylinder to which the same is to be attached. Fig. 5represents a common form of closed cylinder or cylindrical structuremade in accordance with my method, this View being in accurate reductionfrom one of many actual structures, the length of the structure beingtwenty-six feet, diameter seven feet, thickness of walls ninesixteenthsof an inch, and tested pressure one hundred and ninety pounds to thesquare inch.

Referring to the drawings in detail, A represents the body part of thecylindrical structure. B represents the head of the same, and O thethickened and integral walls surroundingan opening D through the head, Ebeing the cylindrically-formed flanges of the head. Such a head may beformed in various ways. In Fig. 1 is shown a circular plate-metal blankF, which by forging or any other suitable process is brought. to ahead-blank form having the thinned and expanded edges G. A headblank,however, may be formed from the plate-blank II of Fig. 2 of greaterdiameter than the corresponding blank F. of Fig. 1, and

its thinned edges I may be produced by turna ing, milling, or by otheraction of cutting away the substance of the blank H. In Fig. 3 is showna blank J, which maybe operated on in any suitable way to have thin nedflanges K, and to such flanges may be welded the annular plate-ring L,of one piece or of several pieces welded together. In each of thesecases a portion of the original blank, as G, I, or K, is left withoutreduction as to thickness, which portion is designed to become the wallsof a hole to be formed through the ultimate blank-head. I'Iowsoever (bythe above-suggested steps or the equivalent otherwise) the head-blank ofa cylinder be formed its ultimate outline is practically that shown by BO D E of Fig. 4, where such a head-blank is shown as finally formed,having its edges cylindrically shaped to the size of the cylindricalbody to which it is to be attached preliminarily to its said edges beingwelded to the body to form the article shown in Fig. 5. In welding thishead to the cylinder-body proper welding mechanism can be insertedthrough the head-opening D for the purpose of operating upon the innerfaces of the head edges and of the edges of the cylinder-body. Also,this opening gives access to the cylinder for the purpose of attachingconnecting-pipes, as also for the purpose of cleaning the cylinder, andgenerally for the purpose of such access to the cylinder-body as may benecessary.

M, Fig. 4, dotted lines, represents a bonnet, closing-plate, or similardevice adapted to close the opening D through the head or other deviceadapted to communicate with such opening. This bonnet is held to thehead by bolts 0, which are threaded in the thickened walls 0 of thehead, such walls being of thickness such that the holes cut for thebolts will afford sufficient anchorage for the bolts without producingleakage around the same or reducing the pressure-retaining strength ofsuch walls relative to the strength of the other walls of the structure.In lieu of the said bolts 0 other similarly-acting securing or anchoringdevices may be employed.

I am aware that various plans have been suggested of reinforcing thewalls of a passage in the head of a cylinder of this class of article;but no plan known to me produces separately from a cylinder-body andadapted to be attached to such a body a head having cylindrical edgesformed therefrom and having walls surrounding an opening through thesame which are integral with and thicker than the walls of the head, nordoes any such plan include a method of producing a cylinder-head blankhaving the walls of a passage through the same integral with the otherwalls of the head and of greater thickness and cylindrically shaping theedge of the head-blank, as described of my herein set forth article andits method of production.

WVhat is claimed as new is As a new article of manufacture, theplatemetal cylindrical structure, having a cylindrical body portion, anda head portion, such head portion having a cylindrical part ofsubstantially the same diameter, and thickness of metal, as the mainbody portion, and a part of the head or end of greater thickness ofmetal than its said cylindrical part, the said thickened part beingperforated, and the cylindrical part of the head portion being welded tothe end of the cylindrical body portion, whereby the completed articlehas its head and body portions integral, and the line of welding is atsome distance from the end of the structure toward its center.

WARREN E. HILL.

\Vitnesses:

R0131. F. GAYLORD, JAMES N. CATLOW.

